dpkg -l 'libstdc++6*'
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                 Version         Architecture    Description
+++-====================-===============-===============-=============================================
ii  libstdc++6:amd64     5.4.0-6ubuntu1~ amd64           GNU Standard C++ Library v3
ii  libstdc++6:i386      5.4.0-6ubuntu1~ i386            GNU Standard C++ Library v3
un  libstdc++6-5-dbg     <none>          <none>          (no description available)